摘要
采用半化学法制备了纯钙钛矿结构的0.50 Pb(Mg1/2W1/2)O3-0.50 PbTiO3 (0.50 PMW-0.50 PT)陶瓷。以醋酸镁代替传统氧化物混合法中的MgO,提高了MgO的分散性和反应活性,能够有效地促进钙钛矿相0.50 PMW-0.50 PT的形成和抑制钨酸铅的存在。随着预烧温度的提高,0.50 PMW-0.5 0PT粉体的钙钛矿相含量增加,当预烧温度为850℃和保温时间为2 h时其钙钛矿含量达到100%;随着烧结温度的提高,0.50PMW-50PT陶瓷的晶粒尺寸增大,而陶瓷的介电常数先增大后减小,介电损耗先减小后稍微增大。0.50 PMW-0.50 PT陶瓷的最佳烧结条件为1 050℃,2 h,最大相对介电常数为7 606。
Pb(Mg1/2W1/2)O30.50PbTiO3 ceramics with pure perovskite phase was prepared by semichemical method. The substitution of aqueous solution of Mg (Ac) 2 for MgO makes it possible to improve the reactivity and distribution; therefore increase the stabilization of perovskite structure. With the increase of pre-firing temperature, the content of perovskite phase increases. When sintering temperature in the range of 950℃ to 1 050℃, the dielectric constant increases and the dielectric loss decreases. The best sintering condition for 0.50 PMW0.50 PT ceramics is 1 050℃ for 2 h and maximum dielectric constant of 7 606 at 1kHz can be acquired.
出处
《电子元件与材料》
CAS
CSCD
北大核心
2003年第1期22-24,共3页
Electronic Components And Materials
